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Question

If tanθ+cotθ=2, then the value of tan3θ+1tan3θ is

A
1
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B
4
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C
2
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D
6
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Solution

The correct option is C 2
tanθ+1tan3θ

tan3θ+1tan3θ=(tanθ+1tanθ)(tan2θ+1tan2θ1)

=2((tanθ+1tanθ)23)

=2(43)

=2

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